Multi-Cloud Service Comparison

Compute

Use Case	AWS	Azure	GCP	OCI
General-purpose VMs	EC2	Virtual Machines	Compute Engine	Compute
Managed Kubernetes	EKS	AKS	GKE	OKE
Serverless functions	Lambda	Functions	Cloud Functions	Functions
Containers without cluster management	ECS/Fargate	Container Apps / Container Instances	Cloud Run	Container Instances

Storage

Use Case	AWS	Azure	GCP	OCI
Object storage	S3	Blob Storage	Cloud Storage	Object Storage
Block storage	EBS	Managed Disks	Persistent Disk	Block Volumes
File storage	EFS	Azure Files	Filestore	File Storage
Archive storage	Glacier / Deep Archive	Archive Storage	Archive Storage	Archive Storage

Data Services

Use Case	AWS	Azure	GCP	OCI
Managed relational database	RDS	SQL Database	Cloud SQL	MySQL HeatWave
Distributed / globally resilient SQL	Aurora Global Database	Cosmos DB for PostgreSQL / SQL patterns	Cloud Spanner	Autonomous Database
NoSQL	DynamoDB	Cosmos DB	Firestore	NoSQL Database
Streaming	Kinesis / MSK	Event Hubs	Pub/Sub / Confluent	Streaming

Platform Selection Notes

1. Prefer provider-native managed services when team expertise and lock-in tolerance are high.
2. Prefer Kubernetes, PostgreSQL, Redis, and open observability stacks when portability matters.
3. Use OCI when Oracle database affinity, predictable networking, or regulated workload isolation are primary drivers.
4. Compare egress, managed service premiums, and support plans before splitting workloads across providers.